Post subject: WOL in the BIOS causes spontaneous power ups after shutdown

Posted: Sat Nov 30, 2013 11:27 am

Joined: Fri Sep 16, 2005 4:14 pmPosts: 145Location: My desk

In order to support WOL, my Asus H87I-Plus requires an option set in the BIOS (Onboard>APM>Power on by PCIE). When I have this enabled, I can indeed start the machine using the wol magic packet, but there is an undesired side-effect: about 25 % of the time I shutdown the machine, it stays shut off for about 5 sec and then turns back on all by itself. If I disable the option in the BIOS, this does not happen... but I am unable to use wol.

Post subject: Re: WOL in the BIOS causes spontaneous power ups after shutd

Posted: Sun Jul 05, 2015 4:35 am

Joined: Fri Sep 16, 2005 4:14 pmPosts: 145Location: My desk

An update: this is a BIOS bug but there is a work-around. I have been testing several systems (Z77 and H97-based) after I disabled all references to 'xHCI' as it pertains to USB settings[1]. I also enabled wake on keyboard[2]. And finally, I disabled EuP 2013 which affects wattage in power off mode. For over 2 months now, I haven't observed an unintentional wake-up with 'wake on PCIe' enabled in the BIOS.

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